If your radon system isn’t performing, you’re gonna have to figure out why. Most homes have positive pressure being introduced through the slab at all times. Hence our industry refrain: “your house sucks”. The first step in any diagnostic journey is to measure your fan pull with a manometer. From there, you’ll want to find how far your pressure field extends. This is done with a micromanometer and test holes from your extraction point. If you have negative pressure through the slab, you have PFE. Find where that pressure line ends, and you may have solved your radon riddle.
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